How does the surgeon determine the number of distal grafts in CABG?

• A. Based on coronary anatomy, disease severity, viability of targets, and the goal of complete revascularization while balancing ischemic time and graft quality.
• B. Based on patient preference only
• C. Based on the color of the graft
• D. Based on the surgeon's favorite technique

Answer: (A)

In CABG planning, the number of distal grafts is determined by the pattern of coronary disease and the viability of the myocardium, with the aim of complete revascularization while balancing ischemic time and graft quality. You look at which coronary territories are significantly blocked and would benefit from bypass, so multivessel disease often requires several grafts to restore blood flow to all viable regions. But you also assess whether the target myocardium is viable; grafting nonviable tissue doesn’t improve function, so nonviable areas are not pursued. The goal is to revascularize all viable, ischemia-prone areas to improve symptoms and prognosis, while not overextending the operation. Each additional graft adds bypass and cross-clamp time, so the surgeon weighs the benefit of each target against the risk of longer ischemic time and potentially diminished graft quality. Choices like patient preference, the color of the graft, or the surgeon’s favorite technique don’t determine the number; those factors do not reflect the anatomical and viability-driven basis for planning distal grafts.